ANKARA, Turkey—The popular Turkish singer Muslum Gurses, adored by many for his melancholic, Arabic-inspired songs, has died. He was 59. Deniz Sener, a cardiologist at Istanbul's Memorial Hospital said the singer, nicknamed "Muslum Baba" or "Papa Muslum," died of heart failure on Sunday. He had been hospitalized since by-pass surgery in November. Gurses, who recorded more than ...